Pixel HeatersRefurbishment

22.01.2014 A.Bitadze

Work done:

Core resistance measurements (for the heating element). Isolation resistance measurements.Measurement are done every month to monitor changes

Inspection of the control, interlock and C31/C32/C33 temperature sensors and connectors.

Relabeling temperature sensor cables and connectors.

Checking existing spare heaters. Created existing spare heater inventory (Twiki page).

Ordered 16 Spare heaters from THERMOCOAX.

Created EDMS folder for documentation.2/14

Work done: Core resistance measurements.

Design Resistance:Barrel/Opto 20.23 ΩDiscs 38.01 Ω

3/14

Work done: Core resistance measurements.

Design Resistance:Barrel/Opto 20.23 ΩDiscs 38.01 Ω

4/14

Work done: Core resistance measurements.

5/14

Work done: Isolation resistance measurements.

Measured isolation resistance for the Heater on Loop 084 was 450 MΩ.Measurements in 09.07.2013 were showing O.L. in GΩ range.

Measurements in 29.08.2013 were showing 450 MΩ . Measurements in 27.09.2013 were showing O.L. in GΩ range. Measurements in 27.10.2013 are showing O.L. in GΩ range.

All other heaters show O.L. for the isolation resistance in GΩ range

Measured isolation resistance for the Heater on Loop 005 is 0.11 MΩ.Measurements in 09.07.2013 were showing O.L. in GΩ range.

Measurements in 29.08.2013 were showing O.L. in GΩ range. Measurements in 27.09.2013 were showing 0.11 MΩ. Measurements in 27.10.2013 are showing 0.11 MΩ.

6/14

Work done: Inspection of the control, interlock and C31/C32/C33 temperature sensors and connectors.

Envelope # 1 Q1A Problem with TC_A Problem with TC_B Problem with C2 Problem with C31 Problem with C32 Problem with C33 Action3

No No No No No Bad connector Change connector for C3, repeat test

56

17Envelope # 2 Q1C Problem with TC_A Problem with TC_B Problem with C2 Problem with C31 Problem with C32 Problem with C33 Action

19

No No No No No Resolder or exchange

TC#2A, then test

2189

11142 29.5 C non stable

Envelope # 3 Q1A Problem with TC_A Problem with TC_B Problem with C2 Problem with C31 Problem with C32 Problem with C33 Action18

No No No No No No Nothing16471

Envelope # 4 Q1C Problem with TC_A Problem with TC_B Problem with C2 Problem with C31 Problem with C32 Problem with C33 Action20

No No No No No No Nothing10121315

Damaged sensor/connector inventory:

Damaged: 5 Thermocouples19 NTC1 Connector (for C33 sensors)

7/14

Work done: Relabeling temperature sensor cables / connectors.

8/14

Work done: Checking existing spare heaters. Created existing spare heater inventory (Twiki page).

Detector Type N of Spares N of low I.R.Pixel Barrel 9 1Pixel Disk 4 0SCT Barrel 3 0SCT EndCap 8 2

Detector Type & Series N Batch N Resistance Comment Images Custom made Coil connector

Power connector (Lemo)

Thermocaple and cable connector

Inlet ConnectorCore Isolation

(at 250V)

Pixel ATLICSC_0006/01 37.2 OL Serto is missing. No heatshrink on CC

16 I N N p

Pixel ATLICSC 0006-04/11 - OL In SR1 G p p pPixel ATLICSC_0006/09 19.6 OL Serto is missing. 13, 14, 15 I N N p

Pixel ATLICSC_0006-01/07 19.8 OL Lemo damaged. No thermocoupls.

1, 2, 3 G D N p

Pixel ATLICSC_0006-02/22 19.9 OL writen on pipe: "shorted"

4, 5 D D D p

Pixel ATLICSC_0006/10 18.6 OL In SR1 connected to test standwriten on pipe: "short"

6,7,8,9 G p p p

Pixel ATLICSC_0006/02 37.5 OL Serto missing. No heatshrink on CC

10,11,12 I G N p

Pixel ATLICSC_0006-02/30 19.3 OL (11MΩ at 500V)

writen on pipe: "heater shorted"

17,18 D D D p

https://twiki.cern.ch/twiki/bin/viewauth/Atlas/HeaterSpares

9/14

Work done: Ordered 16 Spare heaters from THERMOCOAX.

16 Assemblies56 000 CHF

10/14

Work done: Created EDMS folder for documentation.

ID Evaporative Cooling SystemHeater Refurbishment 2013EDMS Id: 1325444https://edms.cern.ch/document/1325444/1 and sub-documents for:PIXEL HeatersEDMS Id: 1325445 https://edms.cern.ch/document/1325445/1 SCT HeatersEDMS Id: 1325446 https://edms.cern.ch/document/1325446/1 Spare HeatersEDMS Id: 1325449https://edms.cern.ch/document/1325449/1 Presentations / Meeting minutesEDMS Id: 1325448 https://edms.cern.ch/document/1325448/1

This EDMS folder contains all documents (Drawings, Measurement Data, Plots, Presentations, Meeting minutes…) related to the heater refurbishment activities.

11/14

On-going activities and plans:

Fixing Broken Sensors (5 TC, 19 NTC, 1 Connector).

Solder Lemo Connectors on control sensor cables (2x88 in SR1 + 2x88 in pit = total 352).

Attach TC sensors instead of C33 NTC sensors (33 sensors).Solder Lemo Connectors on these control sensor cables.

Endescope inspection for 20% of heaters.

Pressure Test at 7barabs.Parts are ready: Manifold, Pressure Sensors, Readout box, PC, Labview program.

Leak Test.12/14

Timetable :

13/14

PIXEL installation flow-chart Jan Feb March April May June2014 Week 1 2 3 4 5 6 7 8 9 # # # # # # # # # # # # # # # # # #PP2, Opto system commissioned pixel cabling C side pixel cabling A side C3F8 distribution rack final & tight heater connectors X X√ heater installation/ connection C side heater installation/ connection A side Pixel conncection to heaterleak check C A Dry wrapping of exhausts/Nose area Pixel trial operation SCT trial operation IBL installation IBL connection IDEP close

THANK YOU FOR YOUR ATTANTION

14/14